Apparatus

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sensors Mode-S transponder

4CC57B

ICAO 24-bit transponder address

Currently assigned to TF-ICT · BOEING 737 MAX 8

Hex
4CC57B
Octal
23142573
Decimal
5,031,291
Tail
TF-ICT
Type
B38M
No current signal · last broadcast Jul 26, 20:10 UTC
Flights observed
434
Distinct callsigns
20
Country
-
Last broadcast
Jul 26, 20:10 UTC

Last known position

Most recent position reported by Mode-S 4CC57B.

Callsign history 20 distinct

Callsign Airline Flights Last seen
ICE681 Icelandair 16 2026-07-25
ICE37B Icelandair 16 2026-07-19
ICE12E Icelandair 15 2026-07-26
ICE680 Icelandair 13 2026-07-25
ICE11P Icelandair 13 2026-07-21
ICE38C Icelandair 12 2026-07-20
ICE7K - 11 2026-07-14
ICE547 Icelandair 8 2026-07-26
ICE546 Icelandair 8 2026-07-26
ICE473 - 8 2026-07-15
ICE18L - 8 2026-07-14
ICE9L Icelandair 7 2026-07-20
ICE604 Icelandair 7 2026-07-24
ICE472 - 7 2026-07-15
ICE12C Icelandair 7 2026-07-20
ICE9V Icelandair 6 2026-07-18
ICE605 Icelandair 6 2026-07-23
ICE55L - 6 2026-07-16
ICE537 Icelandair 6 2026-06-10
ICE43E - 6 2026-06-23

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 ICE855 KEF → ORD Jul 26, 20:00 UTCJul 26, 20:10 UTC10m
2026-07-26 ICE547 CDG → KEF Jul 26, 15:05 UTCJul 26, 18:25 UTC3h 20m
2026-07-26 ICE546 KEF → CDG Jul 26, 11:05 UTCJul 26, 13:50 UTC2h 45m
2026-07-26 ICE12E SEA → KEF Jul 26, 09:15 UTCJul 26, 09:30 UTC15m
2026-07-26 ICE12E SEA → KEF Jul 26, 02:35 UTCJul 26, 04:25 UTC1h 50m
2026-07-25 ICE681 KEF → SEA Jul 25, 19:55 UTCJul 26, 00:45 UTC4h 50m
2026-07-25 ICE681 KEF → SEA Jul 25, 17:35 UTCJul 25, 17:50 UTC15m
2026-07-25 ICE533 MUC → KEF Jul 25, 12:25 UTCJul 25, 16:05 UTC3h 40m
2026-07-25 ICE532 KEF → MUC Jul 25, 07:40 UTCJul 25, 10:50 UTC3h 10m
2026-07-25 ICE680 SEA → KEF Jul 25, 05:40 UTCJul 25, 05:55 UTC15m
2026-07-24 ICE680 SEA → KEF Jul 24, 23:00 UTCJul 25, 00:50 UTC1h 50m
2026-07-24 ICE685 KEF → SEA Jul 24, 10:55 UTCJul 24, 18:05 UTC7h 10m
2026-07-24 ICE604 YYZ → KEF Jul 24, 08:00 UTCJul 24, 08:15 UTC15m
2026-07-24 ICE604 YYZ → KEF Jul 24, 03:30 UTCJul 24, 05:25 UTC1h 55m
2026-07-23 ICE605 KEF → YYZ Jul 23, 20:15 UTCJul 24, 01:45 UTC5h 30m
2026-07-23 ICE597 BCN → KEF Jul 23, 14:15 UTCJul 23, 18:20 UTC4h 5m
2026-07-23 ICE596 KEF → BCN Jul 23, 08:35 UTCJul 23, 12:25 UTC3h 50m
2026-07-22 ICE573 CHQ → KEF Jul 22, 22:30 UTCJul 23, 02:40 UTC4h 10m
2026-07-22 ICE572 KEF → CHQ Jul 22, 16:50 UTCJul 22, 21:05 UTC4h 15m
2026-07-22 ICE88E SEA → KEF Jul 22, 13:00 UTCJul 22, 13:20 UTC20m
2026-07-21 ICE11P KEF → SEA Jul 21, 22:15 UTCJul 22, 03:30 UTC5h 15m
2026-07-21 ICE11P KEF → SEA Jul 21, 20:00 UTCJul 21, 20:20 UTC20m
2026-07-21 ICE83C ARN → KEF Jul 21, 15:35 UTCJul 21, 18:40 UTC3h 5m
2026-07-21 ICE82B KEF → ARN Jul 21, 11:15 UTCJul 21, 13:55 UTC2h 40m
2026-07-21 ICE12E SEA → KEF Jul 21, 09:35 UTCJul 21, 09:50 UTC15m
2026-07-21 ICE12E SEA → KEF Jul 21, 03:00 UTCJul 21, 07:30 UTC4h 30m
2026-07-20 ICE681 KEF → SEA Jul 20, 20:15 UTCJul 21, 01:25 UTC5h 10m
2026-07-20 ICE681 KEF → SEA Jul 20, 17:50 UTCJul 20, 18:05 UTC15m
2026-07-20 ICE9L ZRH → KEF Jul 20, 12:25 UTCJul 20, 16:25 UTC4h 0m
2026-07-20 ICE12C KEF → ZRH Jul 20, 07:35 UTCJul 20, 10:45 UTC3h 10m
2026-07-20 ICE38C YYZ → KEF Jul 20, 01:00 UTCJul 20, 05:50 UTC4h 50m
2026-07-19 ICE37B KEF → YYZ Jul 19, 17:40 UTCJul 19, 23:05 UTC5h 25m
2026-07-19 ICE451 LHR → KEF Jul 19, 12:30 UTCJul 19, 15:20 UTC2h 50m
2026-07-19 ICE450 KEF → LHR Jul 19, 08:00 UTCJul 19, 10:25 UTC2h 25m
2026-07-19 ICE10V ORD → KEF Jul 19, 00:55 UTCJul 19, 06:25 UTC5h 30m
2026-07-18 ICE9V KEF → ORD Jul 18, 21:50 UTCJul 18, 22:45 UTC55m
2026-07-18 ICE9V KEF → ORD Jul 18, 16:35 UTCJul 18, 16:50 UTC15m
2026-07-18 ICE88E SEA → KEF Jul 18, 06:50 UTCJul 18, 13:40 UTC6h 50m
2026-07-17 ICE11P KEF → SEA Jul 17, 20:10 UTCJul 18, 03:35 UTC7h 26m
2026-07-17 ICE597 BCN → KEF Jul 17, 14:15 UTCJul 17, 18:25 UTC4h 10m
2026-07-17 ICE596 - Jul 17, 08:35 UTCJul 17, 12:25 UTC3h 50m
2026-07-16 ICE56K - Jul 16, 08:15 UTCJul 16, 08:30 UTC15m
2026-07-16 ICE56K - Jul 16, 03:35 UTCJul 16, 05:10 UTC1h 35m
2026-07-16 ICE55L - Jul 16, 00:00 UTCJul 16, 01:50 UTC1h 50m
2026-07-15 ICE55L - Jul 15, 20:10 UTCJul 15, 20:20 UTC10m
2026-07-15 ICE473 LGW → KEF Jul 15, 15:20 UTCJul 15, 18:00 UTC2h 40m
2026-07-15 ICE472 KEF → LGW Jul 15, 10:50 UTCJul 15, 13:45 UTC2h 55m
2026-07-15 ICE12E SEA → KEF Jul 15, 02:20 UTCJul 15, 09:05 UTC6h 45m
2026-07-14 ICE681 - Jul 14, 19:25 UTCJul 15, 00:45 UTC5h 19m
2026-07-14 ICE681 - Jul 14, 17:15 UTCJul 14, 17:35 UTC20m

About Mode-S

A Mode-S transponder code (also called an "ICAO 24-bit address" or "hex code") is a 6-character hexadecimal identifier permanently assigned to an aircraft when it's first registered. Unlike callsigns (which change with each flight) or registrations (which can change if an aircraft is sold internationally), the Mode-S address stays with the airframe for the life of the aircraft in that country.

Every ADS-B transmission from an aircraft includes its Mode-S address, making it the most reliable way to identify a specific airframe. Flight-tracking services like Apparatus use the Mode-S address as the primary key for tying position broadcasts, callsigns, and ownership records together.

Prefer a tail-number view? See the TF-ICT page for operator, model, and routing details .

Mode-S 4CC57B frequently asked

What is Mode-S code 4CC57B?
4CC57B is an ICAO 24-bit transponder address. Assigned to TF-ICT.
Is 4CC57B broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 20:10 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 4CC57B, octal 23142573, decimal 5,031,291.
What flights does 4CC57B operate?
Mode-S 4CC57B has broadcast 20 distinct callsigns, including ICE681, ICE37B, ICE12E, ICE680, ICE11P.